I have a 2011 tacoma 4x4 with the regular cab, there is limited space behind the seat and I am wondering if it is possible to fit a subwoofer or subwoofers back there. Anyone who has done this please give me as many specs as possible. Thanks.

i usuall hate hearing what i'm about to tell you but you're posting in the wrong section, there's an audio&video section... you might get better results posting there or requesting a moderator move your post
that being said, yes i've seen many do it, it's a tight fit, but yes